/Engine/Source/Editor/Sequencer/Public/SequencerKeyStructGenerator.h
Allocate a brand new, key struct type, automatically discovering time/value properties from property meta-data. Must be finalized with FinalizeNewKeyStruct
static [UMovieSceneKeyStructType](API\Editor\Sequencer\UMovieSceneKeyStructType) * AllocateNewKeyStruct ( [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct) * ChannelType )